Nonequilibrium dynamics of an ultracold dipolar gas

Abstract

We study the relaxation and damping dynamics of an ultracold, but not quantum degenerate, gas consisting of dipolar particles. These simulations are performed using a direct simulation Monte Carlo method and employing the highly anisotropic differential cross section of dipoles in the Wigner threshold regime. We find that both cross-dimensional relaxation and damping of breathing modes occur at rates that are strongly dependent on the orientation of the dipole moments relative to the trap axis. The relaxation simulations are in excellent agreement with recent experimental results in erbium. The results direct our interest toward a less explored regime in dipolar gases where interactions are dominated by collision processes rather than mean-field interactions.

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Cited by in corpus (12)

• Dipolar physics: A review of experiments with magnetic quantum gases
• A long-lived spin-orbit-coupled degenerate dipolar Fermi gas
• s-wave scattering lengths of the strongly dipolar bosons ${}^{162}$Dy and ${}^{164}$Dy
• Microwave shielding of bosonic NaRb molecules
• Anisotropic expansion of a thermal dipolar Bose gas
• Accurate determination of the scattering length of erbium atoms
• Anisotropic thermalization of dilute dipolar gases
• Anisotropic collisions of dipolar Bose-Einstein condensates in the universal regime
• Linear Response of a Periodically Driven Thermal Dipolar Gas
• Stoner-Wohlfarth switching of the condensate magnetization in a dipolar spinor gas and the metrology of excitation damping
• Thermal Conductivity of an Ultracold Paramagnetic Bose Gas
• Strongly dipolar molecular Bose-Einstein condensates: From few- to many-body physics